dropping the Mag. S&W M&P 40

[nology145]

I have an issue I purchased a stormlake barrel .40 cal with 2 ports at the end of the barrel everytime i shoot it the mag drops out with that barrel now when i try my factory barrel it works fine no problems of any kind what would cause that i have several stormlake barrels for my glock's and they work fine i purchased the S&W M&P 40 in 2006 my mind is boggled.

 

[tarosean]

Is the feed ramp touching the mag?

 

[nology145]

only if the slide is back and the barrel moves back and forth when i cock the gun back when i move it foward the barrel moves foward just a hair the factory barrel does the same thing

 

[Bovice]

Is the mag able to fully seat with that barrel in?

Put the mag all the way in, and tug a little at the baseplate to see if it moves back out. If it isn't fully seated, you'll be able to pull the magazine back out.

 

[nology145]

tried several times mag does not pull out at all

 

[hammerklavier]

A ported barrel, shouldn't the slide have cutouts for the ported area? If not, maybe blowback of gasses knocks out mag.

 

[nology145]

just had my father shoot it it did the same for him i really think it is the barrel

 

[nology145]

no the barrel is extended instead of 4 1/4 it is 4.9 with the 2 ports at the end

 

[Bovice]

My guess is that the feed ramp is is slamming back into your magazine. Do the mags have any unusual marks near the top-front?

 

[nology145]

here is two pics.

 

[wally]

Photos are too small to see anything that might be wrong.